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Numerical Investigation of the Photonic-Crystal Fibres with Suspended Core

100%
Pustelny T., Grabka M.
Acta Physica Polonica A
|
2009
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vol. 116
|
issue 3
385-388
EN
The photonic-crystal fibre with a suspended core was analyzed in order to explain possibilities of its using in investigation of electrooptic and magnetooptic effects occurring in the molecules of gas passed into air holes in the fibre. As results from numerical analysis, even 20% of electromagnetic optical energy can be propagating in the area of the air holes. The obtained results indicate the possibility of scanning the electrooptic and magnetooptic effects in photonic-crystal fibres with a suspended core in the case of considerable diminishing of the core (even below 1 μm) or in the case of light applying with its larger wavelengths.
2
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Photonic-Crystal Fibres with Suspended Core - Numerical Analyses

100%
Pustelny T., Grabka M.
Acta Physica Polonica A
|
2008
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vol. 114
|
issue 6A
A-115-A-120
EN
The paper gives a short description of light guidance mechanisms of index-guided photonic-crystal fibres. The results of numerical analyses of photonic-crystal fibres with a suspended core are presented. Such fibres are planned to be applied for investigation of magneto-optic effects in gaseous media.
3

The effect of cefotaxime and carbenicillin on viability and development of carrot protoplasts

81%
Grzebelus E., Grabka M., Baranski R.
Biotechnologia
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2010
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issue 2
156-164
EN
We examined the toxicity of two antibiotics belonging to the betalactam group, to carrot (Daucus carota L.) protoplasts. Leaf protoplasts were cultured in the presence of cefotaxime or carbenicillin applied in five concentrations in the range from 0.1 to 0.5 mg ml-1. Cell viability, division frequency, and regeneration capacity were assessed to determine the potential toxic effect of the antibiotics. Both antibiotics significantly reduced protoplast viability and their ability to divisions. Their toxic effect intensified linearly with increasing antibiotic concentrations in the culture medium. More pronounced negative effect exhibited carbenicillin, which was evident 24 h after protoplast isolation. It also lowered cell mitotic activity two- to ten-fold, as compared to the control. Despite different reaction of cells exposed to carbenicillin and cefotaxime, callus tissue and somatic embryos were successfully obtained and allowed efficient plant regeneration. The comparison of the obtained results indicates that cefotaxime used in concentrations up to 0.2 mg ml-1 can be recommended in carrot cell cultures to prevent microbial contamination.
4
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Evolution of the diffraction pattern during the transition from the near-field toward the far-field region

71%
Grabka M., Pustelny S., Wajnchold B., Gawlik W., Mergo P.
Bulletin of the Polish Academy of Sciences: Technical Sciences
|
2011
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issue 4
5
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Experimental and Theoretical Study of Light Propagation in Suspended-Core Optical Fiber

61%
Grabka M., Wajnchold B., Pustelny S., Gawlik W., Skorupski K., Mergo P.
Acta Physica Polonica A
|
2010
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vol. 118
|
issue 6
1127-1132
EN
We analyze coupling and propagation of light through a suspended-core microstructured optical fiber. It is experimentally demonstrated that light-coupling efficiency and mode distribution strongly depend on relative position of the fiber's core and a light beam and light polarization. The experimental results are supported with numerical simulations. The developed numerical model confirmed all the observed dependences.
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